my iron ranger sz 9US. but 9.5 should be fine. i dont think 10 good for u.
*my RW at 6month of daily wear:
Quick update, day 2 in a sized one down IR Amber. I was wearing hiking socks for the first day, to really 'break them in'. There were blisters a' plenty. Today I reverted to normal socks and the fit is cool. A little room, but feels close like when its worn in more they'll be a good size. Fingers crossed.
PS I'm at US10 in Chucks, Vans and Nikes. Took these in a US9. Also, I have narrow feet. Think that might bear relevance.